Power-hammer



(No Model.)

0. W. OHOUTT. POWER HAMMER.

UNITED STATES PATENT OFFICE.

ORRIN W. ORCUTT, OF ST. J OHNSBURY, VERMONT.

POWER-HAMMER.

SPECIFICATION forming part of Letters Patent No. 503,492, dated August 15, 1893.

Application filed April 20, 1891. Serial No. 389,700. (No model.)

To all whom it may concern.-

Be it known that I, ORRIN W. Onour'r, a citizen of the United States, residing at St. Johnsbury, in the county of Caledonia and State of Vermont, have invented a new and useful Power-Hammer, of which the following is a specification.

My invention relates to certain improvements in power-hammers wherein a vertically reciprocating hammer operates in conjunction with a fixed anvil; and it consistsin the combination and arrangement of the various parts as will be hereinafter more fully described in the specification and specifically set forth in the claim.

The objects of the invention are, first, to provide an adjustable crank-pin whereby the length of stroke may be adjusted independently of the hammer, and the force of the blow varied, and second, to provide cushions for the hammer and means for securely connecting said hammer, through the cushions, to the crank, whereby shock is prevented from being communicated to the crank. These objects are attained by the mechanism illustrated in the accompanying drawings, in Which- Figure 1 represents an elevation of my improved machine; Fig. 2, a detail sectional view, showing the various adjustments, and Fig. 8, a detail sectional view of the slipsleeve.

Similar letters refer to similar parts through-.

out the several views.

The letter A indicates the crankplate mounted on the shaft Ct, journaled in suitable bearings (not shown) in the frame of the machine. Pivoted to the crank-plate is an adjustable crank-disk, B, formed with a semicircular slot, Z), and a crank-pin D. A clamping-bolt, 0, serves to secure the crank-disk onto the crank-plate, which is counterbored to receive it, and to hold the same rigidly in place until said bolt is loosened. The plate A may be provided with a bundle A by which it may be held, while the crank plate B is shifted, to adjust the stroke of the hammer operating mechanism.

Connected to the crank-pin D is a connecting-rod, E, carrying a sleeve, F, provided with a housing for receiving the springs J and J 2 which are coiled around bosses c and 0 respectively, the short end of spring J being securely fastened by set-screw M and that of J by set-screw M The sleeve F is rigidly held onto the connecting-rod by means of a clamping device, which consists of a collar, f, and a bolt G. The hammer N is connected to the lower end of the springs J and J which are joint-ed, by links L and L respectively. The hammer reciprocates in guides O, 0, formed in the frame of the machine, said guides being on a line perpendicular with the center of the crank-plate and anvil-block Q. The springs are coiled in line with the strain or work, so that they will wind and unwind and not compress lengthwise the coiled section. The springs exert a pressure which tends to hold the links in a nearly horizontal position, so that any downward movement of the hammer, which throws the links below the horizontal line, will tend to wind up said springs, increasing their force and causing the links to again assume an approximately horizontal position.

The operation of the machine will be readily understood in connection with the above description, and is as follows: As the crank plate is revolved it carries the crank disk with it, giving a reciprocating movement to the rod E and sleeve F, and a similar movement to the hammer. To change the length of stroke of the hammer, the bolt 0 is loosened and the disk B turned in the proper direction and when in proper position it is fastoned to the crank plate by clamping the bolt 0.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

In a power hammer, the combination with a crank plate mounted on a driving shaft, and an adjustable disk and adjusting devices mounted on the crank plate, of a connecting rod secured to the pin of the crank disk, the double springs secured to the shoulders of the sleeve on the connecting rod, and connected to the hammer, and the set screws bearing against the free ends of the springs, whereby their tension may be regulated, substantially as specified.

ORRIN V. ORGUTT.

Witnesses:

AUSTIN Hown, B. F. DEAN. 

